Facility scale

At the facility scale (our focused cultural heritage), the FHA should be conducted in heuristic terms: a set of design fire scenarios has to be defined together with their likehood/probability. The last can be assigned as shown above by an event-tree analysis assigning mutually exclusive probabilities to branches at the same level. In order to determine the fire scenarios the following data are needed about the facility:

• - potential fire ignition locations (commonly it can be obtained from electrical/gas plants drawings);
• - location and amount/type of combustible (commonly it can be obtained from architectural design drawings);
• - data about air ventilation of compartments (e.g. door, window, air ventilation system)
• - compartmentation of the floors (it can be only obtained from a fire evacuation plan of the facility, if present);
• - data about active fire protection systems (e.g. splinkers, fire detection systems, if present);
• - location of the nearest firefighter station.
• - fire resistance of the partitions and slabs (as for the previous point, it can be obtained from material data, and eventually from data about passive protections like tumescent painting);
• - fire resistance of structural elements (it can be obtained from material data, and eventually from data about passive protections like tumescent painting).